CN114576341A - Speed-increasing centrifugal compressor - Google Patents

Speed-increasing centrifugal compressor Download PDF

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Publication number
CN114576341A
CN114576341A CN202210368402.1A CN202210368402A CN114576341A CN 114576341 A CN114576341 A CN 114576341A CN 202210368402 A CN202210368402 A CN 202210368402A CN 114576341 A CN114576341 A CN 114576341A
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China
Prior art keywords
transmission
lubricating
gear
speed
motor
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CN202210368402.1A
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Chinese (zh)
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王清旭
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Individual
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Individual
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Priority to CN202210368402.1A priority Critical patent/CN114576341A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/027—Gearboxes; Mounting gearing therein characterised by means for venting gearboxes, e.g. air breathers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
    • F16H57/0404—Lubricant filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0412—Cooling or heating; Control of temperature
    • F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0436—Pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02034—Gearboxes combined or connected with electric machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

A speed-increasing type centrifugal compressor comprises a motor, a speed increaser, a centrifugal compressor and a lubricating system; the motor passes through the speed increaser drive centrifugal compressor, and the speed increaser adopts two-stage transmission including two pairs of meshing gears, two transmission shafts, drives the high-speed rotation of compressor impeller, and impeller shafting and motor shaft system are on the same axis, and lubricating system adopts the injection formula to drive the gear lubrication. The invention has the advantages of wide applicability, impact resistance, high reliability, compact structure, small occupied space, high integration level of a lubricating oil circuit system, low requirements on processing and assembling of a transmission assembly and low cost of the whole machine.

Description

Speed-increasing centrifugal compressor
Technical Field
The present invention relates to centrifugal compressors, and more particularly, to an accelerated centrifugal compressor.
Background
The fuel cell automobile is a novel automobile which takes a motor as a power source, utilizes chemical energy of a fuel cell system to be directly converted into electric energy, provides a main energy source and realizes power driving.
A Proton Exchange Membrane Fuel Cell (PEMFC) is a kind of fuel cell, and has the advantages of high energy conversion rate, environmental friendliness, low operating temperature, suitability for frequent start-up, higher power density than other types of fuel cells, and longer continuous driving distance than a battery electric vehicle, and the PEMFC is also considered as one of the best alternative power sources for automobiles.
In proton exchange membrane fuel cells, hydrogen and oxygen are electrochemically reacted to produce electricity, and the oxygen can be pure oxygen or obtained directly from air, which is more convenient and economical. Increasing the supply pressure of air (i.e., the partial pressure of oxygen) may increase the energy density of the fuel cell system, may also decrease the system size, may increase the stack efficiency, and may improve water balance, and therefore, an air compressor may be required in the fuel cell to supply high-pressure air to the fuel cell.
The performance of an air compressor, an important component of a fuel cell, is critical to the fuel cell and has a direct relationship to the fuel cell performance. The centrifugal compressor has a series of advantages of compact structure, high single-pole pressure ratio, small flow, few easily-damaged parts, stable operation, low noise and the like, and is the mainstream pressurization mode of the vehicle fuel cell at present.
In patent CN 112879318B, a high speed centrifugal compressor is disclosed, in which the first and second compressor impellers are directly driven, and in order to realize high rotation speed, the motor spindle is supported by an air bearing. The air bearing utilizes the compression effect of the wedge-shaped air film between the top foil and the thrust disk to generate axial bearing force. The air bearing has the advantages of extremely low friction resistance, large applicable speed range and wide applicable temperature range. However, the disadvantages of the air bearing are also obvious, namely low bearing capacity, high requirement on processing precision, poor impact resistance and high cost.
Along with the popularization of fuel cell commercial vehicles, the stack power of the fuel cell is also gradually increased, so the air quantity requirement on a compressor is also gradually increased, the volume of the electric direct connection air bearing type centrifugal air compressor is also gradually increased, and the bearing requirement on an air bearing is also gradually increased. But the service condition of commercial car is complicated than passenger car, and is required highly to the shock resistance of part, and electronic direct connection air bearing formula's centrifugal air compressor machine uses and faces certain problem.
In patent CN 110242592B, a speed-increasing centrifugal compressor is disclosed, which uses a friction wheel as a transmission mechanism. In order to solve the problem of gluing of the friction wheel in the process of high rotating speed, a cooling and lubricating oil way is arranged in the friction wheel. However, through the transmission of the friction wheel, the friction force between two wheels is utilized, two states of rolling and sliding must exist between the high-speed transmission wheel and the low-speed transmission wheel, and particularly, instantaneous high temperature is easy to occur in the high-speed state, so that abnormal abrasion of the transmission wheel is caused.
In patent CN 101210574 a, a centrifugal compressor rotor mechanism is disclosed, in which a motor output shaft is supported on a casing through a dual bearing, and is engaged and driven to an impeller through a pair of gears, and the casing is provided with a slinger and an oil guide groove to block the leakage of lubricating oil and recover the lubricating oil to an oil sump.
In patent CN 105298871B, a cantilever centrifugal compressor is disclosed, the motor output shaft is supported on the box body through a double-shaft tile, and is engaged and transmitted to the impeller shaft through a pair of gears. The distance between the two bearings of the impeller shaft is too short, the requirement on the dynamic balance of a rotating part is high, and the gyroscopic effect is easily caused under the condition of high rotating speed.
The patent CN 101210574 a and the patent CN 105298871B mainly aim at the application in the air conditioning field, and have the common characteristic that power is transmitted to the impeller through the first-stage gear in a variable speed manner, and in order to realize a large transmission ratio, under the condition that the outer diameter of the impeller shaft gear is limited by structural strength, the diameter of the input gear is increased, and further the volume of the whole machine is large. If the rotating speed of the centrifugal compressor is more than 10 thousands of revolutions, a common two-pole motor is adopted, the rotating speed ratio is more than 30, and the applicability of single-stage transmission is limited. Meanwhile, the requirement of compactness for vehicles cannot be met.
Disclosure of Invention
The technical problem that this application embodiment will solve provides a speed-up formula centrifugal compressor, satisfies the demand of vehicle fuel cell especially commercial high-power fuel cell to the tolerance, and is with low costs simultaneously, and is shock-resistant, and the reliability is high, and the structure is compact relatively, extensive applicability.
The application provides a speed-increasing centrifugal compressor, which comprises a motor, a speed-increasing gear, a centrifugal compressor and a lubricating system, wherein the motor comprises a first output shaft, a second output shaft, a cooling fan and a motor flange, and the cooling fan is connected with the second output shaft of the motor; the centrifugal compressor includes an impeller and a volute, the impeller being located within the volute; the speed increaser comprises a transmission case body and a transmission mechanism, and is characterized in that:
the transmission box body is connected with the motor flange; the transmission mechanism comprises a first gear, a second gear, a third gear, a fourth gear, a first transmission shaft and a second transmission shaft, wherein the first gear is connected to a first output shaft of the motor and is meshed with the second gear, the second gear is connected with the first transmission shaft, the third gear is connected with the first transmission shaft and is meshed with the fourth gear, and the fourth gear is connected with the second transmission shaft; the first transmission shaft, the second transmission shaft and the first output shaft of the motor are parallel, and the transmission mechanism is supported on the transmission box body;
the impeller is connected to a second transmission shaft of the transmission mechanism. The volute is connected with the transmission box body; the lubricating system is connected with the transmission case body.
Optionally, the speed-increasing centrifugal compressor is characterized in that the transmission case comprises a front case and a rear case, and a rib plate parallel to the transmission shaft is arranged in the transmission case.
Optionally, the speed-increasing centrifugal compressor is characterized in that: and a packing seal is arranged between the transmission box body and the motor flange as well as between the transmission box body and the volute, and a packing seal is arranged between the front box body and the rear box body of the transmission box body.
Optionally, the speed-increasing centrifugal compressor is characterized in that the space of the lower half part of the transmission case body is an oil pool, the upper end of the transmission case body is connected with the atmosphere through a breather, and an oil-gas separation structure is arranged in the breather.
Optionally, the speed-increasing centrifugal compressor is characterized in that: the first transmission shaft of the transmission mechanism is supported on the front box body and the rear box body of the transmission box body through bearings, the second transmission shaft of the transmission mechanism is supported on the front box body of the transmission box body through bearings with grease or ceramic bearings, and the distance between the two bearings is more than 2 times of the width of the bearings.
Optionally, the speed-increasing centrifugal compressor is characterized in that: and the second transmission shaft of the transmission mechanism and the first output shaft of the motor are on the same axis.
Optionally, the speed-increasing centrifugal compressor is characterized in that a sealing ring is arranged between a second transmission shaft of the transmission mechanism and the transmission case, and the sealing ring is arranged between the impeller and the second transmission shaft bearing.
Optionally, the speed-increasing centrifugal compressor is characterized in that: the lubrication system includes: and the lubricating and cooling nozzle comprises a first lubricating and cooling nozzle and a second lubricating and cooling nozzle, the lubricating and cooling nozzle is connected with the transmission box body, the first lubricating and cooling nozzle is positioned above the meshing point of the first gear and the second gear, and the second lubricating and cooling nozzle is positioned above the meshing point of the third gear and the fourth gear.
Optionally, the speed-increasing centrifugal compressor is characterized in that: the lubrication system further comprises: the lubricating oil cooler is located at the rear end of the second output shaft of the motor, the filter is connected with the lubricating oil pump, the lubricating pipeline comprises an oil return pipeline and an oil inlet pipeline, the oil return pipeline is connected with the transmission box body and the lubricating oil pump, and the oil inlet pipeline is connected with the lubricating oil pump, the lubricating oil cooler and the lubricating cooling nozzle.
Optionally, the speed-increasing centrifugal compressor is characterized in that: the lubrication system further comprises: the lubricating oil cooler is located at the rear end of the independent motor, the lubricating pipeline comprises an oil return pipeline and an oil inlet pipeline, the oil return pipeline is connected with the transmission box body and the lubricating oil pump, and the oil inlet pipeline is connected with the lubricating oil pump, the lubricating oil cooler and the lubricating cooling nozzle.
Compared with the prior art, the invention has the following advantages: the application provides a speed-increasing centrifugal compressor, which comprises a motor, a speed increasing gear, a centrifugal compressor and a lubricating system, wherein the motor comprises a first output shaft, a second output shaft and a cooling fan, and the cooling fan is connected with the second output shaft of the motor; the centrifugal compressor includes an impeller and a volute, the impeller being located within the volute; the speed increaser comprises a transmission case body and a transmission mechanism, and is characterized in that: the transmission box body is connected with the motor; the transmission mechanism comprises a first gear, a second gear, a third gear, a fourth gear, a first transmission shaft and a second transmission shaft, wherein the first gear is connected to a first output shaft of the motor and is meshed with the second gear, the second gear is connected with the first transmission shaft, the third gear is connected with the first transmission shaft and is meshed with the fourth gear, and the fourth gear is connected with the second transmission shaft; the first transmission shaft, the second transmission shaft and the first output shaft of the motor are parallel, and the transmission mechanism is supported on the transmission box body; the impeller is connected to a second transmission shaft of the transmission mechanism, and the volute is connected with the transmission box body; the lubricating system is connected with the transmission case body. The motor drives the compressor impeller to rotate at a high speed through the speed increasing action of the speed increasing device, gas is driven by the impeller to be thrown into the volute under the action of centrifugal force, a vacuum zone is formed at the impeller, external fresh gas enters the impeller, the impeller rotates continuously, and the gas is sucked and thrown out continuously, so that the continuous flow of the gas is kept; in theory, the optimal transmission ratio of the two-stage gear transmission is 7.1-50, and the impeller of the centrifugal compressor can be driven to reach the rotating speed close to 150000rpm by a common motor; compared with an electric direct connection air bearing type centrifugal air compressor, the problems of impact intolerance and high cost of the air bearing are solved; furthermore, compared with a friction wheel type speed-up compressor, the gear is driven in a pure rolling mode theoretically, so that the gluing problem caused by rolling and sliding compounding of the friction wheel at a high rotating speed is avoided; furthermore, compared with a single-stage gear transmission speed-increasing type centrifugal compressor, the speed-increasing type centrifugal compressor has the advantages that the transmission ratio range is greatly widened, the applicability is wide, and the structure is more compact under the condition of high rotating speed.
Drawings
Fig. 1 is a cross-sectional view of a speed-increasing centrifugal compressor according to a first embodiment of the present invention.
Fig. 2 is a longitudinal sectional view of the speed-increasing centrifugal compressor according to the first embodiment of the present invention.
Fig. 3 is an external view of the speed-increasing centrifugal compressor according to the first embodiment of the present invention.
Fig. 4 is a layout view of a split lubrication system of a speed-increasing centrifugal compressor according to a second embodiment of the present application.
Wherein: 1-motor, 2-speed increaser, 3-centrifugal compressor, 4-lubricating system.
11-a first output shaft of the motor, 12-a second output shaft of the motor, 13-a cooling fan and 14-a flange of the motor.
21-transmission structure, 22-transmission box body and 23-respirator.
211-front box body, 212-rear box body, 213-box body rib plate, 214-oil pool, 215-packing seal.
221-first transmission gear, 222-second transmission gear, 223-third transmission gear, 224-fourth transmission gear, 225-first transmission shaft, 226-second transmission shaft, 2261-bearing, 2262-sealing ring.
31-impeller, 32-volute.
41-lubricating oil pump, 42-filter, 43-lubricating oil cooler, 44-lubricating pipeline, 441-oil inlet pipeline, 442-oil return pipeline, 443-first lubricating and cooling nozzle, 444-second lubricating and cooling nozzle, 445-oil return port.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit of this application and is therefore not limited to the specific implementations disclosed below.
In the following embodiments of the present application, a speed-increasing centrifugal compressor is provided, which includes a motor, a speed-increasing gear, a centrifugal compressor, and a lubrication system, and is characterized in that: the motor comprises a first output shaft, a second output shaft and a cooling fan, and the cooling fan is connected with the second output shaft of the motor; the speed increaser comprises a transmission case body and a transmission mechanism, and the transmission case body is connected with the motor; the centrifugal compressor comprises an impeller and a volute, the impeller is positioned in the volute, and the volute is connected with the transmission box body; the lubricating system is connected with the transmission box body, the transmission mechanism comprises a first gear, a second gear, a third gear, a fourth gear, a first transmission shaft and a second transmission shaft, wherein the first gear is connected to a first output shaft of the motor and is meshed with the second gear; the first transmission shaft, the second transmission shaft and the first output shaft of the motor are parallel, and the transmission mechanism is supported on the transmission box body; the impeller is connected to a second transmission shaft of the transmission mechanism; the motor drives the compressor impeller to rotate at a high speed through the speed increasing function of the speed increaser, gas is driven by the impeller to be thrown into the volute under the action of centrifugal force, meanwhile, a vacuum zone is formed at the impeller, external fresh gas enters the impeller, the impeller rotates continuously, and the gas is sucked and thrown out continuously, so that the continuous flow of the gas is kept. Wherein, the input power of the motor is determined according to the displacement and the pressure of the centrifugal compressor.
The speed-increasing centrifugal compressor will be described in detail with reference to specific embodiments.
Referring to fig. 1 to 3, the speed-increasing centrifugal compressor includes a motor 1, a speed-increasing gear 2, a centrifugal compressor 3, and a lubrication system 4; the motor 1 comprises a first output shaft 11, a second output shaft 12 and a cooling fan 13, wherein the cooling fan 13 is connected to the second output shaft 12 of the motor 1; the speed increaser 2 comprises a transmission case 21 and a transmission mechanism 22, wherein the transmission case 21 is connected with the motor 1; the centrifugal compressor 3 comprises an impeller 31 and a volute 32, wherein the impeller 31 is positioned in the volute 32, and the volute 32 is connected with the transmission case 21; the lubrication system 4 is connected with the transmission case 21, wherein: the transmission mechanism 22 comprises a first gear 221, a second gear 222, a third gear 223, a fourth gear 224, a first transmission shaft 225 and a second transmission shaft 226, wherein the first gear 221 is connected to the first output shaft 11 of the motor 1 and is meshed with the second gear 222, the second gear 222 is connected with the first transmission shaft 225, the third gear 223 is connected to the first transmission shaft 225 and is meshed with the fourth gear 224, and the fourth gear 224 is connected with the second transmission shaft 226; the first transmission shaft 225, the second transmission shaft 226 are parallel to the first output shaft 11 of the motor 1, and the transmission mechanism 22 is supported on the transmission case 21; the impeller 31 is connected to the second transmission shaft 226 of the transmission mechanism 22; the motor 1 drives the compressor impeller 31 to rotate at a high speed through the speed increasing action of the speed increasing device 2, gas is driven by the impeller 31, the gas is thrown into the volute 32 under the action of centrifugal force, meanwhile, a vacuum zone is formed at the impeller 31, external fresh gas enters the impeller 31, the impeller 31 continuously rotates, and the gas is continuously sucked and thrown out, so that the continuous flow of the gas is kept. The input power of the motor 1 is determined by the displacement and pressure of the centrifugal compressor 3.
Referring to fig. 1 and 2, the transmission case 21 includes a front case 211 and a rear case 212, and a rib 213 parallel to the transmission shaft is disposed inside the transmission case 21, the rib may be plate-shaped or arc-shaped, and the rib 213 may enhance the rigidity of the transmission case and reduce the overall noise.
Referring to fig. 1, a packing seal 215 is provided between the transmission case 21 and the motor flange 14 and the volute casing 32, and a packing seal 215 is provided between the front case 211 and the rear case 212 of the transmission case 21.
Referring to fig. 2, the lower half space of the transmission case 21 is an oil pool 214, the transmission case 21 is connected to the atmosphere through a breather 23, and an oil-gas separation structure is disposed inside the breather 23, and the breather structure is not described in more detail, and reference may be made to the existing product.
Referring to fig. 1, a first transmission shaft 225 of the transmission mechanism 22 is supported on the front case 211 and the rear case 212 of the transmission case through bearings, a second transmission shaft 226 of the transmission mechanism is supported on the front case 211 of the transmission case 21 through a bearing with grease or a ceramic bearing 2261, the distance between the two bearings is more than 2 times of the width of the bearing, so that the center of gravity of the second transmission shaft system falls between the two bearings, and the arrangement can ensure the stability of the second transmission shaft system at high rotating speed.
Referring to fig. 1, the arrangement in which the second transmission shaft 226 of the transmission mechanism 22 and the first output shaft 11 of the motor are on the same axis minimizes the size of the speed increaser.
Referring to fig. 1, a sealing ring is disposed between the second transmission shaft 226 of the transmission mechanism 22 and the transmission housing 21, and the sealing ring 2262 is disposed between the impeller 31 and the second transmission shaft bearing 2261. This arrangement, in conjunction with the grease or ceramic bearing 2261 of the second drive shaft 226, prevents the ingress of lubricant into the compressor, ensuring that the compressed gas is free of oil.
Referring to fig. 1 to fig. 3, the lubricating system 4 includes lubricating and cooling nozzles 443 and 444, and the lubricating oil cooler 43 is located at the rear end of the second output shaft 11 of the electric motor 1; the lubricating and cooling nozzles comprise a first lubricating and cooling nozzle 443 and a second lubricating and cooling nozzle 444, the lubricating and cooling nozzles 443 and 444 are connected with the transmission case body 21, the first lubricating and cooling nozzle 443 is located above the meshing point of the first gear 221 and the second gear 222, the second lubricating and cooling nozzle 444 is located above the meshing point of the third gear 223 and the fourth gear 224, and oil injection cooling ensures the lubrication and cooling of the gears at high rotating speed.
Referring to fig. 1 and 3, which show a solution of direct connection between the lubricant pump 41 and the motor 1, the lubrication system 4 further includes: the lubricating oil cooler 43 is positioned at the rear end of the second output shaft 12 of the motor 1 and is cooled by the motor fan 13; the filter 42 is directly installed on the housing of the lubricating oil pump 41, the lubricating pipeline 44 includes an oil return pipeline 442 and an oil inlet pipeline 441, the oil return pipeline 442 is connected with the transmission case 21 and the lubricating oil pump 41, the lubricating oil in the oil pool at the lower half part of the transmission case 41 enters the lubricating oil pump 41, is pressurized by the lubricating oil pump 41 and then enters the filter 42, is filtered and then enters the lubricating oil cooler 43 through the oil inlet pipeline 441, and is cooled and then enters the lubricating cooling nozzle through the oil inlet pipeline 441, and the pressure is injected to the meshing point of the transmission gear.
Referring to fig. 4, which shows a scheme in which the lubricating oil pump 41 employs an independent driving motor 45, the lubricating system 4 further includes: the lubricating oil cooling device comprises a lubricating oil pump 41, a filter 42, a lubricating oil cooler 43 and a lubricating pipeline 44, wherein the lubricating oil pump 41 is directly driven by an independent motor 45, the lubricating oil cooler 43 is positioned at the rear end of the second output shaft 12 of the motor 1 and is cooled by a fan at the rear end of the independent motor 45; the filter 42 is directly installed on the shell of the lubricating oil pump 41, the lubricating pipeline 44 comprises an oil return pipeline 442 and an oil inlet pipeline 441, the oil return pipeline 442 is connected with the transmission case 21 and the lubricating oil pump 41, the lubricating oil in an oil pool at the lower half part of the transmission case 41 enters the lubricating oil pump 41, is pressurized by the lubricating oil pump 41 and then enters the filter 42, is filtered and then enters the lubricating oil cooler 43 through the oil inlet pipeline 441, and is cooled and then enters the lubricating cooling nozzle through the oil inlet pipeline 441, and the pressure is sprayed to the meshing point of the transmission gear.
Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present application, therefore, the scope of the present application should be determined by the appended claims.

Claims (10)

1. A speed-increasing type centrifugal compressor comprises a motor, a speed-increasing device, a centrifugal compressor and a lubricating system, wherein the motor comprises a first output shaft, a second output shaft, a cooling fan and a motor flange, and the cooling fan is connected with the second output shaft of the motor; the centrifugal compressor includes an impeller and a volute, the impeller being located within the volute; the speed increaser comprises a transmission case body and a transmission mechanism, and is characterized in that:
the transmission box body is connected with the motor flange; the transmission mechanism comprises a first gear, a second gear, a third gear, a fourth gear, a first transmission shaft and a second transmission shaft, wherein the first gear is connected to a first output shaft of the motor and is meshed with the second gear, the second gear is connected with the first transmission shaft, the third gear is connected with the first transmission shaft and is meshed with the fourth gear, and the fourth gear is connected with the second transmission shaft; the first transmission shaft, the second transmission shaft and the first output shaft of the motor are parallel, and the transmission mechanism is supported on the transmission box body; the impeller is connected to a second transmission shaft of the transmission mechanism, and the volute is connected with the transmission box body; the lubricating system is connected with the transmission case body.
2. The speed-increasing centrifugal compressor according to claim 1, wherein the transmission case comprises a front case and a rear case, and a rib plate parallel to the transmission shaft is arranged in the transmission case.
3. The speed-increasing centrifugal compressor of claim 1, wherein: and a packing seal is arranged between the transmission box body and the motor flange as well as between the transmission box body and the volute, and a packing seal is arranged between the front box body and the rear box body of the transmission box body.
4. The speed-increasing centrifugal compressor according to claim 1, wherein the space of the lower half part of the transmission case is an oil pool, the upper end of the transmission case is connected with the atmosphere through a breather, and an oil-gas separation structure is arranged in the breather.
5. The speed-increasing centrifugal compressor of claim 1, wherein: the first transmission shaft of the transmission mechanism is supported on the front box body and the rear box body of the transmission box body through bearings, the second transmission shaft of the transmission mechanism is supported on the front box body of the transmission box body through bearings with grease or ceramic bearings, and the distance between the two bearings is more than 2 times of the width of the bearings.
6. The speed-increasing centrifugal compressor of claim 1, wherein: and the second transmission shaft of the transmission mechanism and the first output shaft of the motor are on the same axis.
7. The speed-increasing centrifugal compressor according to claim 1, wherein a seal ring is provided between the second drive shaft of the drive mechanism and the drive case, the seal ring being between the impeller and the second drive shaft bearing.
8. The speed-increasing centrifugal compressor according to any one of claims 1 to 7, wherein: the lubricating system comprises a lubricating and cooling nozzle which comprises a first lubricating and cooling nozzle and a second lubricating and cooling nozzle, wherein the lubricating and cooling nozzle is connected with the transmission box body, the first lubricating and cooling nozzle is positioned above the meshing point of the first gear and the second gear, and the second lubricating and cooling nozzle is positioned above the meshing point of the third gear and the fourth gear.
9. The speed-increasing centrifugal compressor of claim 8, wherein: the lubricating system further comprises a lubricating oil pump, a filter, a lubricating pipeline and a lubricating oil cooler, wherein the lubricating oil pump is connected with the second output shaft of the motor, the lubricating oil cooler is positioned at the rear end of the second output shaft of the motor, the filter is connected with the lubricating oil pump, the lubricating pipeline comprises an oil return pipeline and an oil inlet pipeline, the oil return pipeline is connected with the transmission box body and the lubricating oil pump, and the oil inlet pipeline is connected with the lubricating oil pump, the lubricating oil cooler and a lubricating cooling nozzle.
10. The speed-increasing centrifugal compressor of claim 8, wherein: the lubricating system further comprises a lubricating oil pump, a filter, a lubricating pipeline and a lubricating oil cooler, wherein the lubricating oil pump is connected with the independent motor, the filter is connected with the lubricating oil pump, the lubricating oil cooler is positioned at the rear end of the independent motor, the lubricating pipeline comprises an oil return pipeline and an oil inlet pipeline, the oil return pipeline is connected with the transmission box body and the lubricating oil pump, and the oil inlet pipeline is connected with the lubricating oil pump, the lubricating oil cooler and a lubricating cooling nozzle.
CN202210368402.1A 2022-04-09 2022-04-09 Speed-increasing centrifugal compressor Pending CN114576341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210368402.1A CN114576341A (en) 2022-04-09 2022-04-09 Speed-increasing centrifugal compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210368402.1A CN114576341A (en) 2022-04-09 2022-04-09 Speed-increasing centrifugal compressor

Publications (1)

Publication Number Publication Date
CN114576341A true CN114576341A (en) 2022-06-03

Family

ID=81784865

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210368402.1A Pending CN114576341A (en) 2022-04-09 2022-04-09 Speed-increasing centrifugal compressor

Country Status (1)

Country Link
CN (1) CN114576341A (en)

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